Electric plug



June 4, 1929. w, HYATT 1,715,366

ELECTRIC PLUG Filed Feb. 7, 1927' INVENTOR. SHNUEL 14 fir/777'.

\ I WWW A TTORNEYJ.

Patented June 4, 1929.

"reins;

SAMUEL w. HYATT, or oomvEn-svILLn, INDIANA, AssIGNoia T0 racism LAMPcoa- POR-ATION, or CONNEBSVILLE, INDIANA, A CORPORATION.

ELECTRIC PLUG.

Application filed February 7, 1827. Serial No. 166,423.

This invention relates to a connector plug particularly adaptable formounting light bulbs. g

The chief object of the invention is to simplify the present type ofconnector plugs and eliminate several of the parts heretofore employedby arranging the parts of'the solid path connector plug such that theyserve for the same purpose as other parts heretofore have served.

The full nature ofthe invention will be 7 understood from theaccompanying drawings and the following description and claims:

In the drawings Fig. 1 is a central sectional view through the metalshell and associated parts, the insulation body being shown inelevation. Fig. 2 is a section taken on line 22 of Fig. 1 in thedirection of the arrows. Fig. 3 is an elevational view of the insulationbody with a portion shownin half section to show other parts in detail.

Fig. 1 is a transverse section taken on line 4-4 of Fig. 1 and in thedirection of the arrows.

In the drawings there is illustrated an insulation body- 10 havingformed integral therewith or suitably secured thereto a peripherallyenveloping collar or flange 11.. Herein said body and flange collar arecylindrical but need not necessarily be so formed. Extendinglongitudinally through the body are a pair of bores 12 and rigidlymounted in each is a terminal member 13 having an enlarged exposedcontact head 14 iand a longitudinally recessed opposite end 15. The plugbody is suitably recessed as at 16 and the terminal member 18 isprovided with a transverse threaded opening 17 in alignment with theopening 16. Then the contact terminal is seated in its bore 12 a screw18 is adapted to rigidlyclamp theend of the wire 19 in the aperture 15of the terminal. The end 19 is a part of the lead-in wire havingsuitable insulation 20. The resultant construction, therefore, is thateach of the tera flared enlargement 22 and a cylindrical extension 23thereof is threaded and associated therewith is a threadedextension 2 1of a rear shell or retainer having a reduced shoulder portion 25 and atubular extension 26 continuing therefrom. A coil spring 27 has one endengageable upon the contracted portion .25 of the rear shell and bearsupon the collar 11 for normally -maintaining the plug body inthe-projected position, reference be- 1 ing had to the open end of theforward shell. Outward movement of the plugbodyis limited by the collar11 engagingthe annular shoulder 22 of the forward shell.

To prevent relative rotative movement between theplug body and the shellto insure accurate predetermined positioning of the terminal contacts14, the plug body is provided with one or more longitudinally extendinggrooves 28 and the shell supports a pin 29, and said pin is seatable insaid groove,

thereby permitting longitudinal relative movement between the shell andthe plug Pin 29 is shown extending outwardly from 'body, but preventingrotative movement.

the shell as at 30 and positioned oppositely V 1. A plug connectorincluding a cylindrical insulation body, a cylindrical shell-slid ablysupporting the, same, yielding means normally tending to project thebody from the shell, cooperatingmeans on the shell and body limitingsuch movement, a contact having an exposed end and movable with andcarried by the body, and a pin and slot connection preventing relativerotative movement between the body and shell, the pin of said connectionprojecting laterally of the shell for bayonet connection and shell an- Ychorage;

2. A device as defined by claim 1, characterized by the opposite end ofthe contact terininating short of the opposite end of the 2 V v V1,715,866-

body, a lead in wire connected to the oppobody at one end andterminating short theresite end of the contact, and a single member ofat the opposite end whereby the insulasimultaneously maintaining rigidconnection tion body normally is fully projected. 1o thcrebetween andsecurely anchoring both In'Wit-ness WhereofiIhave hereuntoafiixed 5contact and lead in Wire to said'body. my signature.

3. A device asdefined by claim 1, charac-, 1 c terized by the shellprojecting beyond the SAMUEL W. HYATT.

